Question

Determine if the sequence 1, 2, 3, 5, 8, 13... is arithmetic, geometric, or niether.

Answer 1

this is the fibonacci sequence
here's the wikipedia article on it: http://en.wikipedia.org/wiki/Fibonacci_number

Answer 2

@cnknd so its neither?

Answer 3

what defines an arith seq?

what defines a geo seq?

Answer 4

I think an arithm seq has constant differences between the terms

Answer 5

and geo seq has constant ratios

Answer 6

lets chk for arith then

1-2=-1
2-3=-1
3-5=-2 ..... can be arith then can it

Answer 7

try geo

2/1 = 2
3/2 = not 2; cant be geo

Answer 8

arithmetic means (+ or -) so yeah its " arithmetic "

Answer 9

So it's arith because it's not ratios?

Answer 10

*cant be arith

Answer 11

Oh, so it's neither?

Answer 12

correct, its neither option

Answer 13

Thank you!

Answer 14

yw